The German Federal Coast Guard (German: Küstenwache des Bundes) is a civilian law enforcement organisation whose primary missions are border protection, maritime environmental protection, shipping safety, fishery protection and customs enforcement. The Küstenwache is an association of several federal agencies, not a single entity like the United States Coast Guard.

The personnel serving with the Küstenwache include both police officers (in the case of the Bundespolizei and Wasserzoll) and civilians from the Waterways and Shipping Office and other agencies. Küstenwache personnel do not have combatant status as it is not a military unit as other coast guards are. In contrast, the United States Coast Guard is both a military service and a law enforcement organisation and its commissioned officers have both police and military powers. However, police officers serving with the Küstenwache retain their usual police powers, adjusted to the maritime nature of their job.

A total of 27 ships and boats from the aforementioned institutions are in operation (Bundespolizei: six ships; Wasserzoll: eight customs cutters, four customs cruisers; WSV: three multi-purpose ships; BLE: two fishery protection boats, three fishery research ships).

The ships are all marked with the legend "Küstenwache" as well as a black-red-gold signet on the hull and the coast guard's coat-of-arms. However, the hull colour differs from agency to agency: blue for the Bundespolizei, green for the Zoll and black for the WSV and BLE.